Sand-dusting screen



Nov. 3, 1925. 1,560,406

L. H. CARUFEL SAND DUSTING 503mm! Filed March 25. 1924 Patented Nov. 3,1925.

UNITED STATES PATENT; OFFICE".

LOUI'S H. GARUFEL, F MINNEAPOLIS, MINNESOTA.

.SAND-DUSTING SCREEN.

Application filed March 25, 1924. Serial No. 701,782.

I new and useful Improvements in Sand-Dust- 'ing Screens, of which thefollowing is a specification, reference being had to the accompanyingdrawings.

This invention relates to certain improvements in sand dusting screensand it is an object of th invention to provide a device of this generalcharacter embodying novel and improved means whereby a number ofstencils may be held thereby in desired arrangement and wherein thescreen is so con structed to permit an adjustable spacing of thestencils.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my im proved sanddusting screen whereby certain important advantages are attained and thedevice rendered simpler, less expensive and otherwise more convenientand advantageous for use, as will be hereinafter more fully set forth.

Th novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, 1 will nowproceed to describe the same with reference to the accompanyingdrawings, wherein Figure 1 is an elevational view illustrating a screenconstructed in accordance with an embodiment of my invention and inassembled relation; 7

Figur 2 is a view in end elevation of the structure as illustrated inFigure 1;

Figure 3 is a sectional view. taken substantially on the line 33 ofFigure 1;

Figure 4 is a longitudinal sectional view taken through the device asherein disclosed;

Figure 5 is a view partly in plan and partly in elevation. of one of thestencils as herein employed;

Figure 6 is a sectional view taken through the stencil as illustrated inFigure 5;

Figure 7 is a fragmentary view partly in section and partly in elevationillustrating a frame constructed in accordance with another embodimentof my invention.

As disclosed in the accompanying drawings, my improved screen comprisesa frame 13 consisting of the side members 1 and the end members 2, theinner edges of the side members 1 are provided entirely therealong withgrooves 3 which receive the tongues 4 carried by the extremities of theend members 2 whereby said side. members 1 and end members 2 are ininterlocking engagement.

Secured tov each end of a. member 1 is 1 bracket 5 provided with asleeve 6 through which is disposed the headed shank or bolt 7, saidshank or bolt 7 being in threaded engagement with a. sleeve 8 carried bythe bracket 9 fixed to the adjacent extremity of a. member 2. The head10 of the shank or bolt Tis arranged outwardly of the sleeve 6 and asherein disclosed has contact with said sleeve whereby upon rotation ofthe shank or bolt in one direction the adja cent extremities of a sidemember 1 and an end member 2 are moved one toward the other. Uponrotation in the opposite direction, said members 1 and 2 are permittedto have separating movement.

The outer faces of the members 1 and 2 have disposed thereover metalliclaminations or sheets 11 suitably affixed thereto and cemented orotherwise attached to the outer face of each of the laminations 11 is alamination 12 of rubber. The assembled laminations 11 and 12 extend apredeten mined distance inwardly of the inner man gins thereof and forwhich reason such laminations of the end members 2 terminate a distanceinwardly of the extremities thereof to permit the extended portions ofthe laminations carried by the side members to overlap the adjacent endsof the members 2.

Adapted to be arranged between the side members 1 and adjustablypositioned therealong as the occasions of practice may re quire, are thebars 14, the ends of which being provided with the tongues 15 to bereceived within the grooves 3 of the mem bers 1. Adjacent bars 14 areadapted to be spaced apart in accordance with the size 1 of the stencils16 to be interposed and arranged therebetween and such adjustment of thebars 14' may be readily effected. The bars 14 alsouhave superimposedthereupon the laminations 11 of metal and'12 of rubber, said laminationsof each bar 14 terminating'inwardly of the opposite ends thereof topermit the desired lapping of the laminations 11 and 12 of the sidemembers 1.

The stencils 16 when applied serve to hold the bars 14 in place as thesebars are loose at all times. After the stencils have been properlymounted, the resultant spaces in a row and the spaces between adjacentbars let are adapted to be closed by the filler blocks 17.

The stencils 16 are preferably made of rubber and have suitable openingsa cut therein to produce the desired letter,-character or symbol. InFigure 5 the stencil is of a type wherein the desirediletter .is formedby the use of a center piece 16 positioned Withinthe opening a, saidcenter piece 16 being held in applied position by the tieor bridge pin18, the portions of said pin disposed across the resultant opening beingprovided with a covering l9 of rubber so that effective resistance willbe offered to the sand blast to prevent cutting of said tie or bridgepin. While Figure 5 shows a stencil to reproduce the letter O, it is tobeunderstood that a stencil will be similarly constructed in connectionwith the letters A, P and thelike.

It is also to be understood that the tie or bridge portions Z) areraised sufficiently high from theunder-surface of the-stencil to permitthe sand blast to flow therebeneath.

The construction of a stencil as just described can be accomplished veryeconomically.

In the embodiment of my inventionas illustrated in Figure 7, the sidemembers .1 and each of the end .members 2 are held together by the bolt20 engaged within the grooves 21in the outer face of:the end member land the adjacent end of each'of the members 2. Coacting with theopposite end portions of the bolt 20 are the holding nuts 22 hereindisclosed as of a wing type.

lVhile I have h ereinbefore referredzto ,my invention as particularlyadapted for use as a sand dusting screen lit is also to be. understoodthat the same can be used by paintersin connection with the wellsknownair brush process. a

Certain of the features disclosed in @this application are described andclaimedin my pending application Serial No..1'. ,286 filed Mai-ch21,1925.

From the foregoing description it is thought to be obvious that asanddusting screen constructed in accordanceflwith my invention isparticularly well adapted for use by reasonof the convenience andfacility with which is may be 21SSB111bld;ilI1Cl operated, and it willalsovbe obviousthat my invention is susceptible of some change and,modification without departing from the principles and spirittthereofrand for :this reason I do not wish to be understood.:aslimiting myself .tothe precise arrangement and formation of theseveral parts herein shown in carrying out my invention in practiceexcept as hereinafter claimed.

1 claim 1. A sand blasting screen comprising a frame, said frameconsisting of separable side and end members, means carried by theadjacent extremities of the side and end members for connecting saidmembers and to move the same one with respect to the other, barsinterposed between and held by opposed members of vthe frame, stencilsarranged between adjacent bars, said bars and the associated members ofthe frame interfitting when in assembled relation.

.A sand blasting screen comprising a frame, said frame consisting ofseparable side and end members, means carried by the adjacentextremities of the side and end members for connecting said members andto move the same one with respect to the other, bars interposedbetweenand held by opposed members of the frame, stencils arrangedbetween adjacent bars, and rubber laminations disposed over the outerfaces of the members of the frame and the bars.

3. A sand blasting screen comprising a frame, said frame consisting ofseparable side and end members, means carried by the adjacentextremities of the side and end members for connecting said members andto move the same one with respect to the other, bars interposed betweenand held by opposed members of the frame, stencils arranged between adjacent bars, and rubber laminations disposed over the outer faces of themembers of the frame and thebars, the laminations carried by thememberswith which the bars engage extending beyond theinner margins ofthe members to overlap the adjacentend portions of the bars.

a. A sand blasting screen comprising a frame, said frame consisting ofseparable side and end members, sleeves carried by the adjacent endportions of said members, and a holding member disposed through eachpair of adjacent sleeves.

5. A sand blasting screen comprising a frame, said frame consisting ofseparable side and end members, sleeves carried by the adjacent endportions of said members, and a holding member disposed through eachpair of adjacent sleeves, said ,member .being in threaded engagementwith one of the sleeves.

In testimony whereof I hereunto attix my signature.

LOUIS nioaanrnn

